Oracle自动插入当前时间的年月日YYYY-MM-DD格式的实现
oracle没有date()函数,sysdate函数的值是包括时分秒的,要实现插入当前时间默认值还真麻烦.
Oracle没有date()函数,sysdate函数的值是包括时分秒的,要实现插入当前时间默认值还真麻烦.
只好自己写储存过程,而字段默认值里面又不能调用储存过程,还得写个触发器!而储存过程里面取出来的sysdate前几位的只却变成17-11月-07的格式了,不是自己想要的,2007-11-17的格式,又得单独取年月日再组合起来,这样一来返回值就不能是日期类型而要字符类型了.
一个字,烦!不过还是把他实现了.下面把代码给大家分享一下,如果有更好的方法麻烦告知.
1.储存过程
CREATE OR REPLACE FUNCTION "GET_DATE" RETURN VARCHAR2
IS
yyyy varchar2(36);
mm varchar2(36);
dd varchar2(36);
tempdate varchar2(36);
BEGIN
tempdate := '';
select to_char(to_date(sysdate),'YYYY') into yyyy from dual;
select to_char(to_date(sysdate),'MM') into mm from dual;
select to_char(to_date(sysdate),'DD') into dd from dual;
tempdate := substr(yyyy,1,4)|| '-'||
substr(mm,1,2)|| '-'||
substr(dd,1,2)
;
return tempdate;
END;
2.触发器
CREATE OR REPLACE TRIGGER STATWEEK_tg
--STATWEEK fdate 的触发器
BEFORE INSERT ON STATWEEK FOR EACH ROW
BEGIN
SELECT get_date INTO :NEW.fdate FROM DUAL;
END;
注:这里的STATWEEK为对应的数据表 fdate为自动增长的字段,get_date为对应的储存过程名.
3.数据表
-- Create table
create table STATWEEK
(
星期一 VARCHAR2(20) default 0,
星期二 VARCHAR2(20) default 0,
星期三 VARCHAR2(20) default 0,
星期四 VARCHAR2(20) default 0,
星期五 VARCHAR2(20) default 0,
星期六 VARCHAR2(20) default 0,
星期日 VARCHAR2(20) default 0,
TWEEK VARCHAR2(10),
ADMIN VARCHAR2(50),
FDATE VARCHAR2(20)
)

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